-Added g_sim and g_sim_level to generics declaration of eth.vhd.

.../arts_unb1_sc1_bg_1GbE/src/vhdl/arts_unb1_sc1_bg_1GbE.vhd

...iboard1/libraries/unb1_board/src/vhdl/ctrl_unb1_board.vhd

libraries/io/eth/src/vhdl/eth.vhd